HMS hospitals are divided into six geographic regions as identified by the map above.
Northern Region (Dark Blue)
- Marshfield Medical Center Dickinson
- McLaren Northern Michigan
- Munson Healthcare Cadillac Hospital
- Munson Healthcare Grayling Hospital
- Munson Medical Center
- MyMichigan Medical Center – Alpena
- MyMichigan Medical Center – Sault
- OSF St. Francis
- UP Health System- Marquette
Southern Region (Orange)
- Beacon Health Kalamazoo
- Bronson Battle Creek
- Bronson Methodist Hospital
- Corewell Health Grand Rapids Hospitals
- Corewell Health Lakeland Hospitals
- Holland Hospital
- Trinity Health Grand Rapids
- Trinity Health Muskegon
- University of Michigan Health-West
Thumb Region (Purple)
- Covenant Medical Center
- Henry Ford Genesys Hospital
- Henry Ford River District Hospital
- Hurley Medical Center
- Lake Huron Medical Center
- McLaren Bay Region
- McLaren Central Michigan
- McLaren – Flint
- McLaren – Lapeer Region
- McLaren – Port Huron
- Memorial Healthcare
- MyMichigan Medical Center – Alma
- MyMichigan Medical Center – Midland
- MyMichigan Medical Center – Saginaw
Central Region (Light Blue)
- Chelsea Hospital
- Henry Ford Jackson
- Hillsdale Hospital
- McLaren – Greater Lansing
- Michigan Medicine
- ProMedica Monroe Regional Hospital
- Trinity Health Ann Arbor
- Trinity Health Livingston
- University of Michigan Health- Sparrow Lansing
Southeast Region (Green)
- Corewell Health Beaumont Troy Hospital
- Corewell Health Farmington Hills Hospital
- Corewell Health William Beaumont University Hospital
- DMC Huron Valley Sinai Hospital
- Henry Ford Macomb
- Henry Ford Madison Heights & Warren
- Henry Ford Providence Novi
- Henry Ford Providence Southfield
- Henry Ford Rochester Hospital
- Henry Ford West Bloomfield
- McLaren – Macomb
- McLaren – Oakland
- Trinity Health Oakland
Metro Region (Yellow)
- Corewell Health Beaumont Grosse Pointe Hospital
- Corewell Health Dearborn Hospital
- Corewell Health Taylor Hospital
- Corewell Health Trenton Hospital
- Corewell Health Wayne Hospital
- DMC Detroit Receiving Hospital
- DMC Harper University and Hutzel Women’s Hospitals
- DMC Sinai-Grace Hospital
- Garden City Hospital
- Henry Ford Hospital
- Henry Ford St. John Hospital
- Henry Ford Wyandotte
- Karmanos Cancer Center
- Trinity Health Livonia